<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<HTML>
  <HEAD>
    <TITLE>package org.geotools.nature</TITLE>
  </HEAD>
  <BODY>
    Algorithms related to the observations of natural phenomenons. Most algorithms in this package are
    derived from empirical measurements; their results are <u>approximative</u>. Algorithms include:
    <BR>
    <UL>
       <LI>Sea water properties (density, sound velocity, fusion temperature,
           <cite>etc.</cite>) computed from salinity, temperature and pression
           using algorithms published by UNESCO.</LI>
       <LI>Values relative to earth calendar, like tropical year length.</LI>
       <LI><cite>etc.</cite></LI>
    </UL>


    <P>&nbsp;</P>
    <TABLE BORDER="3" ALIGN="center" CELLPADDING="6" BGCOLOR="#FEF3D6" WIDTH="75%">
    <TR>
        <TD ALIGN="center" BGCOLOR="#FFD6AC"><font COLOR="#804040" SIZE="5" FACE="Arial Black"><STRONG>References</STRONG></FONT></TD>
    </TR>
    <TR>
      <TD>
        <P><FONT SIZE="2">Alain Poisson, M.H. Gashoumi and Selim Morcos.</FONT><BR>
           <FONT SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;<U>Salinity and density of seawater: table for high salinities (42 to 50)</U>.<BR>
                          &nbsp;&nbsp;&nbsp;&nbsp;Unesco technical papers in marine science #62 (1991).</FONT></P>
        <P><FONT SIZE="2">Unesco<BR></FONT>
           <FONT SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;<U>International oceanographic tables</U>, volume 4.<BR>
                          &nbsp;&nbsp;&nbsp;&nbsp;Unesco technical papers in marine science #40 (1987).</FONT></P>
        <P><FONT SIZE="2">Franck J. Millero.<BR></FONT>
           <FONT SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;<I>Solubility of oxygen in sea water</I> in <U>Progress on oceanographic tables and standards 1983-1986</U>.<BR>
                          &nbsp;&nbsp;&nbsp;&nbsp;Unesco technical papers in marine science #50 (1986) pp.13-14.</FONT></P>
        <P><FONT SIZE="2">Unesco<BR></FONT>
           <FONT SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;<U>The international system of units (SI) in oceanography</U>.<BR>
                          &nbsp;&nbsp;&nbsp;&nbsp;Unesco technical papers in marine science #45 (1985).</FONT></P>
        <P><FONT SIZE="2">N.P. Fofonoff and R.C. Millard Jr.<BR></FONT>
           <FONT SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;<U>Algorithms for computation of fundamental properties of seawater</U>.<BR>
                          &nbsp;&nbsp;&nbsp;&nbsp;Unesco technical papers in marine science #44 (1983).</FONT></P>
        <HR>
        <FONT SIZE="2">Tropical year length is computed
        using formula by <strong>Laskar (1986)</strong>. Synodic month length is
        computed using formula by <strong>Chapront-Touze and Chapront (1988)</strong>.
        Those formulas was taken from the following adress:</FONT><BR>
        <UL>
          <LI><A HREF="http://webexhibits.org/calendars/year-astronomy.html">
              <FONT SIZE="2">http://webexhibits.org/calendars/year-astronomy.html</FONT></A></LI>
          <LI><A HREF="http://www.treasure-troves.com/astro/TropicalYear.html">
              <FONT SIZE="2">http://www.treasure-troves.com/astro/TropicalYear.html</FONT></A></LI>
        </UL>
      </TD>
    </TR>
    </TABLE>
  </BODY>
</HTML>
